Republican Sen. Kelly Ayotte called on Shinseki to resign a week ago, while the three Democrats — Sen. Jeanne Shaheen, Rep. Annie Kuster and Rep. Carol Shea-Porter — did so on Wednesday.

They were prompted by a scathing new report that found systemic problems in the medical system for military veterans.

Shaheen says she has tremendous respect for Shinseki and that he has made important progress, but it is clear that he has been unable to solve what she called outrageous problems at the VA. Shea-Porter says fresh leadership is required to fix institutional dysfunction.